Furnace-arch.



W. D. RANNEY.

FURNACEARCH.

APPLICATION FILED JAN-29, 1918.

1,289,262. Patented Dec. 31,1918.

WILLIAM D. RANNEY, OF COLUMBUS, OHIO.

FURNACE-ARCH.

Application filed January 29, 1918.

To all whom it may concern Be it known that I, WILLIAM D. RANNEY, acitizen of the United States, residing at Columbus, in the county fFranklin and State of Ohio, have invented a certain new and usefulImprovement in Furnace-Arches, of which the following is aspecification.

This invention relating to furnaces has for its object to provide animproved construction of fire box arch of simple and economicalconstruction that can be erected without the aid of expert workmen. Asnow generally used such arches are hand sprung, that is they are builtof fire brick over a specially erected form.

The expansion and contraction of a hand sprung arch over a furnace fireand the end thrust due to the weight of the arch on the side Walls has atendency to cause it to fall and shortens the life of the arch, therebynecessitating a rebuilding or removal of the entire arch and side walls.The present invention obviates these troubles and provides an arch whichcan be economically and easily repaired by replacing any of its parts.

The invention is embodied in the construction shown in the accompanyingdrawing and set forth in the following description, the features ofnovelty being finally claimed.

In said drawings- Figure 1 is mainly a vertical longitudinal section ofa boiler furnace equipped with my invention.

Fig. 2 is a structure.

Fig.v 3 is a front elevation of the arch structure as viewed from theleft hand side of Fig. 2.

Fig. 4: is a perspective view of one of the blocks used in the archstructure.

In the views 5 designates the side walls of the furnace between which issupported an ordinary boiler 6.

The character 7 designates the opening through which fuel is supplied tothe fire box, said opening being provided with the usual door 8.Supported between the door arch and the ordinary bridge wall 9 is a topplan view of the arch Copies of this patent may be obtained forSpecification of Letters Patent.

five cents each,

Patented Dec. 31, 1918.

Serial No. 214,323.

grate of any suitable construction but preferably of the shaking varietyinclined to about fifteen degrees rearward. Below the grate is the ashpit 10 to which access is had through an opening in the door archprovided with a door 10 In the fire box above the grate I provide anarch including a frame consisting of a series of bars 11 resting asshown, removably at their upper ends upon a plate 12 inserted in thecrown of the door arch and at their lower ends removably as shown upon across bar 13, supported at its opposite ends in the side walls of thefurnace. The

bars 11 are arranged parallel to each other and should have a diprearward of about fifteen degrees from the horizontal. The lower ends ofsaid bars are bifurcate to straddle the cross bar 13. Removablysupported upon and between the bars 11 are blocks 14 which have end lips14E to rest on the upper edges of the adjacent bars 11. These blocks aremade of such dimensions as to be easily handled but so as to practicallyfill the frame made up of the bars 11 by use of blocks of uniformdimensions. These blocks are made of fire clay or other refractorymaterial or compound adapted to withstand a high temperature. It will beobserved that this arch can be taken down and repaired or replaced inany of its parts without destruction of the door arch or side walls.

Changes can be made in the forms and sizes of the parts ithout departingfrom the gist of the invention as claimed.

What I claim is:

In combination with the fire box and door arch of a boiler furnace, aplurality of parallel bars extending rearwardly in the fire box, each ofsaid bars resting removably at its forward end upon the crown of thedoor arch and having its rear end bifurcate, a bar supported between theside walls of the fire box and receiving and supporting the bifurcateends of said parallel bars, and blocks of refractory material havinglips resting removably upon said parallel bars to support the blocksbetween them.

WILLIAM D. RANNEY.

by addressing the "Commissioner of Patents,

Washington, D. 0.

